DRC for older GDS file format

oily

Hello,

I wonder if it is possible to script a DRC, which checks a layout for a maximum number of polygons/path vertices. In version 3 of the GDS II file format, these are limited to 200.
I need this DRC for an older software tool, which uses this file format.

I could manage to check by Ruby, but got stuck at the output to the DRC report database.

Thanks,
Oliver

Matthias

Hi Oliver

there is no such DRC rule yet, but you can add one:

# Include this in your DRC script to add a new check "polygons_with_more_points".
# This check will create a new layer with all polygons with more than n points.
class DRC::DRCLayer
  def polygons_with_more_points(n)
    res = []
    self.data.each do |p|
      p.num_points > n && (res << p)
    end
    return DRC::DRCLayer::new(@engine, RBA::Region::new(res))
  end
end

input(1).polygons_with_more_points(5).output(100, 0)

But beware: this check is slow since it is implemented in Ruby and it iterates over the flat data.

Matthias